FIG 1. Axial CT images of midthoracic lesions.

A, Image obtained in a patient with no known cancer shows the planned angle, entry point, depth to the most posterior part of the cortex, and depth to the lesion. Biopsy revealed adenocarcinoma, probably originating from the lung.

B, Image obtained in a patient with a history of breast cancer shows radiopaque skin markers in place to determine the entry point. Biopsy confirmed suspected metastatic breast cancer.